[FEATURE] Support Waves Protocol 1.5

[alexeykiselev]

List of tasks required to support Waves Protocol version 1.5

Preparation

• Network stack refactoring
  • Extract the connection logic into a separate FSM that should work on every P2P connection
• State refactoring
  • Introduce a separation layer that allows to apply to the state an intermediate state objects
  • Implement state intermediate structures and hashing functions for them
  • Implement functions to convert transactions into a lists of intermediate structures
• Other
  • Add support of attachment field to the Order structure. #1134
  • Implement tree-like script results
  • Add separate PR with a new feature (Protocol 1.5) and RideV8 placeholder; Rebase other PRs on this new one #1186
  • Store the list of affected addresses for each transaction in the light node mode #1389